100% Traction: When the lawn is wet or the property falls with many ups and downs, the spikes give the robot mower better traction, no more digging in the lawn. With our Bosch Indego A material-related advantage is that the tips are rust-proof and therefore durable. Dimensions: 171mm x 2mm. Additionally, 12 stainless steel screws are included. Easy to install and a beautiful and healthy lawn: simply center the spikes on the wheels and secure them with the screws provided. The high-quality spikes ensure a beautiful lawn. No more holes in the lawn when driving your Bosch Indego robot lawn mower. High compatibility: with a wheel size of 171 mm, compatible with Indego XS 300 400 350 M700 2021, made of 2.0 stainless steel mm, deburred, box contents: 2 tips, 14 stainless steel flat head screws.